---
title: Python Engineer (Langgraph)
company: apreel
category: Programista
subcategory: Python
experience_level: Regular
work_mode: remote
location: Warszawa
employment_type: B2B
salary_min: 20200
salary_max: 30200
salary_currency: PLN
salary_period: month
technologies: [Python, LangGraph, LangChain, Fast API, LLM, AI, Celery]
posted: 2026-05-28
valid_through: 2026-06-28
url: "https://solid.jobs/offer/32205/apreel-python-engineer-langgraph"
---

# Python Engineer (Langgraph) — apreel

## Kluczowe informacje

- **Firma:** apreel
- **Lokalizacja:** Centrum, Warszawa
- **Tryb pracy:** 100% zdalnie
- **Wynagrodzenie:** 20.2k–30.2k PLN netto/m (B2B)
- **Forma zatrudnienia:** B2B
- **Wymiar etatu:** 100%
- **Godziny pracy:** Elastyczne godziny pracy
- **Poziom doświadczenia:** Regular
- **Minimalne doświadczenie:** 5 mies.
- **Kategoria:** Programista
- **Specjalizacja:** Python
- **Data publikacji:** 2026-05-28
- **Aktywne do:** 2026-06-28

## Technologie i umiejętności

**Wymagane:**

- Python — zaawansowany
- LangGraph — zaawansowany
- LangChain — zaawansowany
- Fast API — zaawansowany
- LLM — zaawansowany
- AI — zaawansowany
- Celery — zaawansowany

## Języki

- Polski — ekspert
- Angielski — zaawansowany

## Opis stanowiska

As Principal AI Engineer you are the technical owner of the AI core. You lead the audit of the existing codebase, define the architecture we evolve toward, build the test and evaluation harness that lets us ship changes safely, and you are the engineer who is paged when the AI surface misbehaves in production.    What you'll do    First 90 days     Audit atlas-ai: agent flows, LangGraph state machines, Celery topology, datastore usage, OpenAI integration patterns    Produce a written assessment of operational risk: failure modes, race conditions, retry semantics, idempotency, checkpoint integrity    Quantify token cost per agent flow and per user session    Identify the highest-risk subsystems and propose stabilisation plans    Build (or harden) an evaluation harness for the agent flows — golden cases, regression suites, hallucination/safety tests    Lead the knowledge-transfer sessions from the client's AI team     Ongoing     Set the technical direction for the AI core    Lead design for new agent flows and major changes to existing ones    Own the production health of the AI surface (with platform/SRE support)    Hire and mentor the rest of the AI squad (~10 engineers at full scale)    Represent the AI core in cross-team architecture conversations with the client

## Kogo szukamy

Must-have skills     7+ years Python    Deep LangGraph experience    Strong LangChain ecosystem knowledge    Production FastAPI — streaming responses, dependency injection, middleware, async patterns    Celery + Redis broker in production    Concurrency in Python — asyncio (gather, structured concurrency, cancellation), threading boundaries, mixing sync and async code safely    Multi-datastore operations — MongoDB + Redis + Postgres    OpenAI API at scale — rate limits, retries with exponential backoff, fallback model routing, streaming, tool/function calling    Agent design patterns — ReAct, plan-and-execute, supervisor patterns, tool-use loops, multi-turn state, interrupt resumption    Prompt engineering with discipline    Token cost optimisation    Production LLM observability    Testing discipline — pytest (including pytest-asyncio)    Pydantic v2 fluency, type-hinted code throughout     Nice-to-haves     RAG production experience (vector stores: Pinecone, Qdrant, pgvector)    Production incident command for LLM-powered systems    ML engineering background    Anthropic / Claude API experience in addition to OpenAI    Data pipeline experience (Airflow, Dagster, Prefect)    Experience working with cross-team JSI / native bridges (the Python core integrates with a mobile JSI layer)

## Lokalizacje

- Centrum, Warszawa, Polska

## O firmie — apreel

**Wielkość firmy:** 300

Firma apreel powstała w kwietniu 2010 roku. W miarę rozwoju firmy i równolegle ze wzrostem poziomu zaufania klientów, jej działalność poszerzyła się o usługi Outsourcingu Specjalistów IT. Dziś to właśnie ten obszar stanowi główny filar działalności apreel.

## Aplikuj

Aplikuj na: https://solid.jobs/offer/32205/apreel-python-engineer-langgraph

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*Źródło: https://solid.jobs/offer/32205/apreel-python-engineer-langgraph · Wygenerowano: 2026-05-28T13:58:51Z*